Subversion Repositories HelenOS

Rev

Rev 4201 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (c) 2006 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup klog KLog
  30.  * @brief HelenOS KLog
  31.  * @{
  32.  */
  33. /**
  34.  * @file
  35.  */
  36.  
  37. #include <stdio.h>
  38. #include <ipc/ipc.h>
  39. #include <async.h>
  40. #include <ipc/services.h>
  41. #include <as.h>
  42. #include <sysinfo.h>
  43. #include <io/stream.h>
  44. #include <console.h>
  45. #include <event.h>
  46. #include <errno.h>
  47.  
  48. #define NAME "klog"
  49.  
  50. /* Pointer to klog area */
  51. static wchar_t *klog;
  52. static count_t klog_length;
  53.  
  54. static void interrupt_received(ipc_callid_t callid, ipc_call_t *call)
  55. {
  56.     async_serialize_start();
  57.    
  58.     count_t klog_start = (count_t) IPC_GET_ARG1(*call);
  59.     count_t klog_len = (count_t) IPC_GET_ARG2(*call);
  60.     count_t klog_stored = (count_t) IPC_GET_ARG3(*call);
  61.     count_t i;
  62.    
  63.     for (i = klog_len - klog_stored; i < klog_len; i++)
  64.         putchar(klog[(klog_start + i) % klog_length]);
  65.    
  66.     async_serialize_end();
  67. }
  68.  
  69. int main(int argc, char *argv[])
  70. {
  71.     console_wait();
  72.    
  73.     count_t klog_pages = sysinfo_value("klog.pages");
  74.     size_t klog_size = klog_pages * PAGE_SIZE;
  75.     klog_length = klog_size / sizeof(wchar_t);
  76.    
  77.     klog = (wchar_t *) as_get_mappable_page(klog_pages);
  78.     if (klog == NULL) {
  79.         printf(NAME ": Error allocating memory area\n");
  80.         return -1;
  81.     }
  82.    
  83.     int res = ipc_share_in_start_1_0(PHONE_NS, (void *) klog,
  84.         klog_size, SERVICE_MEM_KLOG);
  85.     if (res != EOK) {
  86.         printf(NAME ": Error initializing memory area\n");
  87.         return -1;
  88.     }
  89.    
  90.     if (event_subscribe(EVENT_KLOG, 0) != EOK) {
  91.         printf(NAME ": Error registering klog notifications\n");
  92.         return -1;
  93.     }
  94.    
  95.     async_set_interrupt_received(interrupt_received);
  96.     klog_update();
  97.     async_manager();
  98.    
  99.     return 0;
  100. }
  101.  
  102. /** @}
  103.  */
  104.